Transparency no. 10.1.

Position of chisel in chipping and cutting-off operations

(1) chipping chiselling

(2) cutting-off chiselling

Transparency no. 10.2.

Principle of wedge penetration (chisel edge) into the material

(1) equal wedge angles - unequal action of force

1 action of higher force

2 action of lower force (smaller depth of penetration)

(2) different wedge angles - equal action of force

3 smaller wedge angle

4 bigger wedge angle (smaller depth of penetration)

(3) different edge lengths - equal action of force and equal wedge angle

5 smaller length of edge

6 bigger length of edge (smaller depth of penetration)

Transparency no. 10.3.

Kinds of chisels

(1) flat chisel (chipping chisel)

(2) round chisel (3) cape chisel

(4) shear chisel

(5) grooving chisel

(6) mortise chisel

Transparency no. 10.4.

Chiselling-off of thin metal sheets

(1) Scribing and drilling

1 scribed line

2 bore line

(2) Chiselling out of "webs" with a mortise chisel

Transparency no. 10.5.

Shearing-off of metal sheets

(1) shearing-off of longer metal sheets by shearing chisel and dog vice for sheet metal (angle steel with clamp)

1 dog vice for sheet metal

2 shearing chisel

(2) shearing process in a vice

3 vice jaws

4 chisel angle of inclination of about 45°